build_covform: Build a object or formula to use with covset

In dmutate: Mutate Data Frames with Random Variates

Build a object or formula to use with covset

Description

build_covform formulates then parses a formula that can be used in a covset. build_covobj just assembles the object directly.

Usage

build_covform(
  var,
  dist,
  args,
  lower = NULL,
  upper = NULL,
  by = NULL,
  envir = parent.frame()
)

build_covobj(
  var,
  dist,
  args,
  upper = NULL,
  lower = NULL,
  by = NULL,
  envir = parent.frame()
)

Arguments

var	variable name, character.
dist	distribution function name.
args	character vector of arguments for dist.
lower	lower limits for var.
upper	upper limits for var.
by	grouping variable.
envir	environment for resolving symbols in expressions.

Details

When length of var is greater than one, both lower and upper must be named vectors when specification is made. However, it is acceptable to specify nothing or to use unnamed limits when the length of var is 1.

Value

A covobj object.

Examples

build_covform("WT", "rnorm", c("mu = 80", "sd = 40"), lower = 40, upper = 140)
build_covform("WT", "rnorm", "80,40", lower = 40, upper = 140)

build_covobj("WT", "rnorm", "80,40", lower = 40, upper = 140)

dmutate documentation built on Jan. 17, 2026, 1:06 a.m.